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XU Jianping1,2, ZHOU Li1,3, QIU Tianlong1,3, LI Ye1,2, CHEN Fudi1,2, DU Yishuai1,3, Sun Jianming(1 Key Laboratory of Experimental Marine Biology, Chinese Academy of Sciences, Institute of Oceanology, Qingdao 266071, Shandong, China;#br# 2 University of Chinese Academy of Sciences, Beijing 100049, China;#br# 3 Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071 , Shandong, China)
徐建平1,2，周 利1,3，邱天龙1,3，李 叶1,2，陈福迪1,2，杜以帅1,3，孙建明1,3 （1中国科学院海洋研究所，中科院实验海洋生物学重点实验室，山东 青岛 266071；
2 中国科学院大学，北京 100049；
3 中国科学院海洋大科学研究中心 山东 青岛 266071）
Abstract:
In order to improve the pretreatment of marine aquaculture wastewater, and reduce the scale and energy consumption of subsequent water treatment equipment, a continuous flow electrocoagulation (EC)-filtration pretreatment system was designed to investigate the influences of anode materials, hydraulic retention time (HRT) of EC reactor and filtration pore size on its water treatment capacity. It was found that the removal rate of EC on chemical oxygen demand (CODMn) increased with the addition of the Fe electrode proportion in the anode, and the effect was significant (P < 0.05). The anode materials had no significant effect on the removal of total nitrogen (TN) (P > 0.05). The pH of water decreased during EC. Compared with Al or Fe anode, when Al-Fe compound electrode was used as anode, the system could better remove COMMn and TN. In addition, with the increase of HRT and the decrease of filtration pore size, the removal rate of the system on CODMn and TN increased. When HRT was 4.5 min, anode was 2Al+2Fe and filtration pore size was 45 μm, the removal rate of the system on CODMn and TN was the highest, respectively (53.02±0.74)% and (58.90±1.96)%, the energy consumption was (31.35±0.6)×10-3 kWh/m3, and the dissolution rate of Al anode and Fe anode was (0.11±0.01) mg/s and (0.05±0.00) mg/s respectively. The study showed that EC-filtration system had fairly good removal effects on CODMn and TN, and ECcould significantly enhance the treatment efficiency of subsequent filtration equipment.
摘要： 为提高对海水养殖水体的预处理水平，降低后续水处理单元的规模和能耗，设计了一套连续流电絮凝（Electrocoagulation，EC）-过滤预处理系统，探讨阳极材料、EC反应器水力停留时间（HRT）及过滤孔径对其水处理能力的影响。试验发现，EC过程对化学需氧量（CODMn）的去除率随着阳极中Fe电极比例的增加而增加且影响显著（P＜0.05）；阳极材料对总氮（TN）的去除无显著影响（P＞0.05）；EC过程中水体pH呈现下降趋势。相比Al阳极或Fe阳极，Al-Fe组合电极做阳极时，系统对CODMn和TN的去除效果更好。随着HRT的增加和过滤孔径的减小，系统对CODMn和TN的去除率增加。在HRT为4.5 min、阳极为2Al+2Fe、过滤孔径为45 μm的条件下，EC-过滤系统对CODMn和TN的去除率最高，分别为(53.02±0.74)%和(58.90±1.96)%，能耗为(31.35±0.6)×10-3 kWh/m3，Al阳极和Fe阳极的溶解速率分别为(0.11±0.01) mg/s和(0.05±0.00) mg/s。研究表明，EC-过滤系统对CODMn和TN有较好的去除效果，EC能明显提高后续过滤设备的处理效率。
